Might be hard to dance with girls if you’re dressed as something bulky. Although I like the Rubik’s cube idea because it reminds me of my Cheerios box costume when I was 10!
What is your goal at this dance? Do you want to be unique? Make a certain impression? Or do you just need any acceptable, cheap idea in order to go to the dance? Will you be dancing, or is it ok for the costume to inhibit movement? Those are some things to think about that might help you decide what to dress up as.
Vampires are hot right now, and, let’s face it, vampires are, well….hot. Dress in black, get a cheap cape and some plastic fangs. Slick your hair back. You’ll have an excuse to nibble on a girl’s neck. Is that bad to suggest to a 15 year old?
Borrow a suit from you dad, have your best friend also borrow a suit from his dad, throw on some sunglasses, and go as the Blues Brothers.
Dress like Kanye and have your date dress like Taylor Swift. Spend the night interrupting her constantly and announcing that another girl’s costume is better than hers. Maybe make sure she’s ok with that first.